Fashion Union Size Guide: What Size Am I in Fashion Union? Fit Advice & UK Sizing Help

Fashion Union is one of the UK’s favourite destinations for affordable trend-led fashion. Known for its polished party dresses, elevated basics, and wearable day-to-night styles, the brand is stocked on ASOS and worn by thousands of women looking for fashion-forward looks without a designer price tag.

But despite its high street roots, one question comes up time and time again:

“What size should I buy in Fashion Union?”

Whether you're shopping a puff-sleeve midi dress or a tailored co-ord set, knowing how Fashion Union sizes actually fit can save you time, returns, and guesswork. That’s why tellar.co.uk is here—to match your exact measurements to Fashion Union's sizing (and over 1,500 other brands) so you always know the right size for you.

Does Fashion Union Run Small or True to Size?

Fashion Union uses standard UK sizing and is generally true to size, but the cut and fabric of each piece can affect how it fits.

Here's what to expect across categories:

• Dresses: Often cut slim at the waist with less stretch—true to size, but may feel snug on curvier shapes.

• Blazers and tailoring: Structured and sleek, sometimes narrow through the shoulders—size up if layering.

• Tops and shirts: Generally true to size, but cropped styles may feel short if you have a long torso.

• Trousers and skirts: High-waisted fits that favour slim hips—may run small if you’re pear-shaped or curvier below.

Rather than guessing based on past orders, tellar.co.uk helps you get it right every time by comparing your measurements with Fashion Union’s specific cuts.

Fashion Union UK Size Chart

Here’s the general sizing breakdown for Fashion Union:

But static size charts don’t tell the full story—fabric type, cut, and silhouette can shift the fit. That’s why tellar.co.uk offers real-time personalised sizing advice, based on your body and Fashion Union’s design blocks.

Brands Similar to Fashion Union (And How They Compare)

If you’ve worn brands like Bershka, Stradivarius, PrettyLittleThing, or Nasty Gal, you’ll find some overlap in sizing and fit—but there are subtle differences.

• Bershka Sizing Help: Tends to run smaller and shorter in length

• Nasty Gal Fit Guide: Often roomier and less structured

• Stradivarius Size Guide: Slim fit, especially in trousers and blazers

• Miss Selfridge Fit Tips

  : Similar to Fashion Union in dresses and co-ords

You can compare all these brands to Fashion Union side by side using your saved profile on tellar.co.uk.

Customer Feedback on Fashion Union Fit

We’ve compiled real shopper feedback from Tellar.co.uk users to highlight how Fashion Union fits in real life:

On Dresses:

“Loved the shape but had to size up for my bust. Waist was spot on, but no stretch in the bodice.” – UK 10, hourglass

On Blazers:

“Fits beautifully across the body, but a bit tight in the shoulders. I’d recommend sizing up if you want to layer.” – UK 12, broad shoulders

On Mini Skirts:

“Cute design but snug on the hips. Fabric didn’t stretch much.” – UK 8, curvy hips

These insights are factored into our recommendation engine at Tellar.co.uk—so your result reflects more than just a tape measure.

Not Sure of Your Measurements?

You’re not alone. Most people only guess their bust, waist, and hips—which leads to returns and sizing confusion.

Tellar.co.uk makes it simple:

• We send you a free measuring tape

• You input your bust, waist, and hip sizes once

• We match your measurements to Fashion Union and 1,500+ other brands

• Your profile is saved securely for future shopping

👉 Create your free size profile here

Fashion Union Fit by Category

We’ve reviewed multiple Fashion Union styles and collections to give you this quick reference:

Still unsure? tellar.co.uk instantly.

Why Use Tellar.co.uk?

Because it takes the guesswork out of fashion sizing—especially when you’re shopping from fast fashion brands with variable fits.

At tellar.co.uk, you’ll:

• Know your exact Fashion Union size before you check out

• Get accurate results using your actual measurements

• Compare your size across 1,500+ brands

• Save time, returns and uncertainty every time you shop

It’s completely free and takes under a minute to use.

Check your Fashion Union size now

Follow Tellar.co.uk for Style & Sizing Updates

We regularly publish new sizing advice, brand comparisons, and real fit guides for UK shoppers.

Follow us on:

• Instagram – @Tellarsizing

• Pinterest – TellarUK

• Facebook – TellarSizing

• Twitter – @TellarSizing

Other high street guides you may find useful:

• ASOS Size Guide

• Boohoo Fit Help

• Stradivarius Sizing Breakdown

Final Thoughts: What Size Should I Buy in Fashion Union?

Fashion Union is generally true to UK sizing, but cut, fabric and design can shift how each item fits. If you’re shopping their occasionwear, co-ords or tailoring, we recommend checking your measurements—and using tellar.co.uk for instant size confirmation.

Your perfect fit is one click away.

Stop guessing, start shopping smarter.